Published at Tuesday, 05 November 2019. Subtraction Worksheets. By Galla Legendre.
NEVER use "skill and drill" worksheets. These are the worksheets just made up of columns of problems. There are better materials out there, so do not resort to skill and drill. The very worst problem of skill and drill worksheets is the greatly increased chance of a practiced mistake. The same problem will likely appear several times on the same sheet. A wrong answer once means a wrong answer several times; and a practiced mistake takes hundreds of correct repetitions to fix. This danger alone is important enough to never use any worksheet. I am quite serious about how difficult it is to repair a practiced mistake. Learning is hard enough. Re-learning is much more difficult.
Know the author has background. This person needs to have a background in education and, ideally, should be trained in the latest educational methods, like brain-based teaching/learning. I personally would never use any materials with my child that did not specifically mention being "brain-based." I am not talking about just "research-based." I see more and more sites claiming to have research-based materials, but what I find is definitely NOT based on how the brains actually learns. Brain-based learning is relatively new in the educational world, but most worksheet sites and materials are using old science or, more often, no science at all.
On the first day of each month the canteen cooks hamburgers. The Cook needs 1/10 of a kg of mince, 1/8 of a lettuce and 1/5 of a lettuce for each burger. How much of each item does the Cook need to have on hand if every student (except 5) order a hamburger? It takes Principal Jones 20 minutes to walk from his house to the school. If he walks to the school in the morning and home in the afternoon. How long will he walk in total in 1 school week? How long will he walk in total in a 9 week term? The school day starts at 9:00 a.m. First break is from 11:00 a.m to 11:20 a.m. The second break is from 1:00 p.m to 1:40 p.m. The school day finishes at 3:00 p.m. How much time do the students spend in class in one day? How much time do the students spend in class in one week? How much time do the students spend on break in one day? How much time do the students spend on break in one week?
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