When math worksheets are self-explanatory to the students themselves, like the example below, they're self-explanatory to teachers, parents, homeschoolers, aides, student teachers, and tutors too. Everyone is on the same page when worksheets are self-explanatory.

Too many kids fall behind during math lessons because they don't know their math facts. Don't let this happen to your child this year. Send them to FactFreaks, the website I created to get my students up to speed with all 400 basic facts. It only takes a minute to play and is 100% free, no ads!