"C" is for Cause and Effect
It is imperative that students learn cause and effect. For example, if we cut a circle into a spiral, hang it from the ceiling and place a heater under it, the heat from the heater will rise, causing the spiral to spin.
The number 7 multiplied 3 times equals 21.
or, 7 x 3 = 21
If we have a compound subject, that causes the subject to become plural, and the effect is that we need a plural verb.
Fred and Bob found a fossil.
But, possibly even more important, our students need to learn cause and effect as it applies directly to their lives. For example, if they try hard and study, they will make good grades (unless the work they are given is way beyond their intellectual level). If they do not turn in their math papers and "forget" eight times, they will then have eight zeros and will not make good grades. If they prove themselves friendly, they will have friends.
To sum it up, if our students learn to work hard and play by the rules, they will do well in school, and that will probably transfer to doing well in life.