1) when making y (or x) the subject from the linear eqn, the signs were mixed up hence resulting in getting wrong answers;
2) though some pupils can substitute linear eqn into non-linear eqn, they could not simplify the quadratic eqn obtained when fractions were involved.
The test showed that pupils who failed are weak in simplifying algebraic fractions. These pupils need to work on the skills before they are able to solve simult eqns well. Hence, I have arranged to meet up with these 15 pupils the following week for remediation. During the remediation, more simult eqns will be given to them for practice. In the mean while, arrangements are made for most pupils in the whole level who are identified for E Math SRP this week to practice on simplifying algebraic expressions and indices.
Great effort to sieve out the real problem of pupils not getting it right.
ReplyDelete1) sounds like they are no very clear of equation concept, "moving" terms across the =.
2) Fractions seems to knock them down, likely to have the misconception between terms and factors. may want to get them to clear this misconception: (a-b)/(a+b) is not 1-1