My Opinions about Two Major Math Resources

A MiddleWeb Blog

I am always looking for new resources for my math classes. But before I spend time incorporating a resource into my classroom, I want someone’s honest opinion and an idea of what it can do.

As a result, I’m always looking for useful teacher feedback and advice about resources – and I think it’s a good idea to give back (and pay it forward) too.

I use IXL and Delta Math regularly in my own classroom, so I thought I would share some information about each of them in case you would like to try them in your own classroom. This is not a paid advertisement or anything like that… I’m just sharing what I’ve learned.

There are four basic questions I always want answered before I implement a new math resource:

(1) Is it free?
(2) How much prep time will be involved?
(3) Is it instructionally sound?
(4) Do students like it?

Here’s my breakdown for IXL and Delta Math.

The IXL Mathematics Platform

What Is IXL?

IXL is billed as “immersive adaptive learning.” According to their website, they offer “3,700 distinct math topics.” The skills range from Pre-K all the way to Calculus, sorted by grade level. Questions are algorithmically generated, meaning “students will never see the same question twice no matter how long they practice.” Students start out at 0% and each correct question ups their “score.” Conversely, every wrong answer drops their score. (See the explanation here.)

Is It Free?

There are a free version and a paid version. I used the free version of IXL until our school bought a subscription for the service a few years ago. The free version will only allow students to complete five problems in each topic, and the teacher cannot view students’ progress. I thought the free version was useful, although obviously it doesn’t have the features the paid version has. According to the IXL website, “the standard classroom license is $299 for up to 25 students for one subject.” If a license is needed for more than one classroom, you have to contact an IXL representative for a quote.


There are some days that I feel like IXL saves my life. It is such a great tool for when I have to be out of class on the spur of the moment. I can assign my students an IXL and can rest assured that they will have an assignment that they can complete. If a student misses a problem, IXL will provide a tutorial explaining how to solve the problem correctly. I can view their progress immediately and see who did the work and who didn’t.


Of course, nothing is perfect. I have found that students can pick up patterns and will be able to answer questions correctly without really understanding the concept. Also, students will try to answer questions without writing anything down which can hinder their understanding. Not writing down any work is a bad habit to get into in math class!

What Do the Students Think

The students at my school are very familiar with IXL. They have been using it for at least three years. Recently I had them complete a survey for me. I asked them if they liked working problems on IXL, and about 60% said yes and about 40% said no. An impressive 67% thought IXL helped them understand concepts, which seems pretty conclusive to me.

I also asked students if anything about IXL frustrated them. Students found several aspects of IXL to be frustrating. Many students said they did not like the scoring system used by IXL. Missing one problem “takes you down a lot of points” was a common comment. In fact, about 75% found the scoring system for IXL to be frustrating. Other students found the explanations given to the problems that they missed to be unhelpful or confusing.

Final Thoughts on IXL

I am careful not to overuse IXL. I found that it works best as a tool that is used in addition to classroom instruction. I have learned from experience to require that students write down their work if they want to receive credit.

I do like to use IXL for whole classroom discussions. I project questions on the smartboard, and we answer the questions as a whole class. Interestingly, 86% of students said they preferred doing IXLs in class as opposed to doing them at home.

It has been my experience that if I don’t work through every IXL all the way to completion before I assign them to students, I will get an unpleasant surprise, such as a question that requires students to know a concept that we haven’t gotten to yet. It does take me some time to work through the IXLs before I assign them to the students.

At this point I have found the best use for IXLs is to practice basic skills that students need reinforced. We recently used it in my Algebra 2 with Trig class to brush up on factoring out a monomial, and I think it really helped my students.

Delta Math

What Is Delta Math?

Delta Math is an online resource which allows students to practice problems covering topics from middle school, Algebra 1, Geometry, Algebra 2, Pre-Cal, Calculus and computer science. I have only recently started using Delta Math, so I’m not as familiar with it as I am with IXL, but what I’ve seen I really like!

Is It Free?

Yes! It is completely free! There is a place for donations via Pay Pal, but I had to look to find it. You’ll need to set up a free account to get access to the details. Here’s a short review by Richard Byrne at his popular blog Free Technology for Teachers.


It’s free! It is very user friendly. It has topics that cover every standard that I teach. The problems on Delta Math seem to fit seamlessly into my lessons. In fact, I used it last week to help students learn how to factor trinomials.

Typically when I teach factoring trinomials, I start with puzzles (usually on paper) that help students find two numbers that will multiply to give a certain number and the same two numbers that will add to get the same number (a necessary skill when factoring trinomials with a coefficient of 1). I was so happy and surprised to find that Delta Math had a game exactly like that; it’s called The X Game and it has three different levels. I used it to introduce my lesson and the students were able to transfer that skills easily to factoring trinomials.

Another great feature is the “Create Test Correction.” It allows you to go in and pick specific problems for students to work based on the problems they missed on the test. The teacher can decide what percentage of the points a student can earn back to go toward their final test score. I haven’t had the chance to use this feature, but I plan to after I give my next test.


The only cons I have found are the ones common to these kinds of resources. A couple of times it was tricky to get the answer in the form that Delta Math would accept; however, I think that can be true for most online learning platforms.

What Do the Students Think

I asked my students to work through some assignments on Delta Math and to give me their opinion. The majority of students really liked Delta Math. They said the explanations that were given when they missed a problem were more succinct and understandable than what they found on IXL. The students really didn’t have anything negative to say about Delta Math. To be fair, they have only started using it this school year.

How I Use It in My Classroom

While I like IXL for helping students brush up on needed skills, I think Delta Math can do a little more than that. With the test correction feature which allows students to pinpoint their areas of weakness, I think Delta Math can be used to really move students forward.

Every day I continue to find new features on Delta Math that I like. Today I found the “random student caller” feature which allows me to randomly pick a student’s name.

If you want to know what other math teachers think about Delta Math, just search Delta Math on Twitter. Lots of other math teachers seem to like Delta Math too!

If you are interested in using Delta Math, follow this link to a YouTube video which explains how it works.

Do You Use Delta Math and IXL in Your Classroom?

I would love to hear how your opinions about Delta Math or IXL. Or if you use another resource, I’d love to hear about that too!

Michelle Russell

Michelle Russell (@michel1erussel1) is a math teacher at Florence (AL) High School. She began her career as a student teacher in middle school and has taught students from 7th to 12th grade. She currently teaches high school math, including Algebra, Pre-Calculus, AP Statistics, and Algebra 2 with Trigonometry. In her free time, she enjoys reading books about math education and following other math teachers on social media.

23 Responses

  1. Stephanie Eastwood says:

    Thanks so much for your thorough, reflective reviews. Student opinions valuable too. This is so helpful, Michelle.

  2. Sara Goldrick says:

    I am an Instructional Coach and have just started researching DeltaMath as an alternative/supplement to IXL, which our department uses. Thank you for your insight regarding both programs.

  3. Caitlin Hamner says:

    I had not heard of Delta Math and am now very interested in testing it out! We use IXL frequently and, while I like it a lot, my students have the same feelings as yours. I’m looking forward to looking into Delta Math, thank you for the insight.

  4. Christy says:

    Yes, thank you! We have used IXL for several years. I use it to reinforce skills and I agree, it has saved me many times for subs and the week before Christmas!
    The videos that IXL posts are also very helpful. I used to have my students get to 100%, before moving on. This can be frustrating- now, I let them go to 80% if they feel they have worked hard. Surprisingly, I have students who will still take easy tasks to 100%.
    I appreciate the review in Delta math, I haven’t used it yet, but I definitely would like to use it for make up tests!

    • Michelle Russell says:

      Thank you for your comment! I didn’t know there were videos with IXL, I’ll have to look into that!

  5. Todd Newsom says:

    I teach at an alternative high school and teach algebra 1, algebra 2, geometry, algebraic reasoning. Delta Math allows me to create full semesters of assignments for my students. The explanations are sufficient to help most of my students to correct mistakes.

    One of the features on Delta Math is the flexibility to offer a second chance on problems that are missed. This allows a student to go in and research their problem through the Example Question section.

  6. Jana Ponec says:

    Unfortunately, Delta Math doesn’t have enough questions for middle school students.

  7. M. S. says:

    I started using DeltaMath this year at the suggestion of a colleague and I LOVE IT! At my daughter’s school, she uses IXL and I was interested in that until I found out how much it was going to cost (*gasp*!!!!). DeltaMath is AMAZING. My whole department is using it. I use it as often as possible because the students become more independent learners–they know what mistake they made and they can use that to help correct future examples. I love it because the kids get immediate feedback on what they have done and whether or not they are doing it correctly. I love it because I don’t have to come up with problems myself. I love it because it takes less than 5 minutes to create and assign problems. I love it because of all the information you can get when you look at the student’s report. I love it because it makes my job so much easier!!!!!!

  8. Tracy Kania says:

    Delta math appears to be not up to date with technology and is difficult to use as a teacher. I will try it and see what my students say.

    • Richard Oteng says:

      Really? That’s a big surprise as I am a heavy user of DeltaMath. I use the paid version where students get access to even videos to help with the understanding of concepts before solving the problem.
      One feature that’s worth using is the “Penalty”.
      For every question the student gets wrong, the system generates extra questions of the same difficulty level until the students master that concept. So if you set it to 2 off, it means the students need to solve 2 more questions in order to proceed to the next major problem.

  9. carrie says:

    I normally use IXL, but the cost is so prohibitive! A colleague introduced me to Delta math. I would like to use it but during virtual learning I love the fact that I can “see the problem” that a student is working on in IXL. You can’t see the problem a student is on in Delta until after they answer it.

    • Shana says:

      Once a student has been given a problem in Delta Math, you can see it by clicking on the ?, just like you can see the problem they’re on after submission by clicking on the x or check. Until they answer it, the problem appears as a ? mark. After answering, it becomes an x or a check. And if you hover over their problems, you can see how long they spent on the problem. If you have the paid version, you can see how long they watched a video in the same way.

  10. Katie says:

    I only started using DeltaMath today – yes, today! My students are working on it riiiiight now. But – it looks like Delta Math doesn’t have a live feature. Is that true?

    • Michelle Russell says:

      As far as I know it does not. They have recently added a paid version called Deltamath plus and I haven’t had the chance to look into what it offers.

      • Richard Oteng says:

        I have. The paid version gives students access to a “help” video before they work on the problem. The video has two formats; Vimeo or Youtube.
        If your school internet restricts access to Vimeo, you will have to change the settings under Tools in order for your students to see the Help video.

  11. Julie Prater says:

    Any tips on students setting up their delta math account? Username/password
    Can you view their username and password or change the password if they forget it?

  12. Konna says:

    Thank you so much for this review. It is exactly what I was looking for to compare these two sites! Tried Delta Math today with grade 7s and they loved it!

  13. Dania El-Iraqi says:

    Hi Michelle,

    I was searching for a similar website to both IXL and deltamath and stumbled upon your article. So, I thought you may be able to help me. I, too am a math teacher, I teach middle and high school and like you I use both IXL and deltamath regularly. Our curriculum, however, follows IB which involves a lot of higher statistics than what is provided by either IXL or deltamath and I was wondering if you, by any chance know of a similar website that covers frequency tables, cumulative frequency tables and curves (graphs), histograms and such topics? Someone directed me to Dr. Frost Math, which does seem to offer all that. Unfortunately, they won’t allow me to create a teacher account as our school is not a governmental school nor is it in the UK.

  14. B Franklin says:

    Your review is spot-on.

    DeltaMath is the iXL we can afford. And, actually, it’s better in many ways, including the videos, the assignment settings options, the way assignments can be customized.

    And, it’s the system that my students actually ASK for. It amazes me when they do that!!

  15. tom says:

    I’m a student that uses delta math and every kid i know hates it, it drowns us in work that we don’t know how to do, and it just causes stress.

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