The development of any nation depends on its scientific and technological prowess which when
pivoted on sound mathematical foundation helps acquisition of functional skills for productive
contribution to society. However, students have difficulty in applying mathematical knowledge to
science learning. This study investigated the influence of Mathematical Language Ability (MLA) and
Students’ Parental Supports (SPS) on achievement in senior school science subjects in Ogun State.
It adopted a survey research type with two research questions raised and six hypotheses formulated.
Seven hundred and twenty students were randomly selected from six out of eleven public senior
secondary schools purposively selected in Ijebu Ode Local Government Area, Ogun State. Three
test instruments: Mathematical Language Ability Test (r = 0.85), Students’ Parental Supports
Questionnaire (r = 0.75) and Students’ Achievement Test (r = 0.78) were used for data collection.
Data analysis using regression analysis revealed a significant influence of MLA on students’
achievement in the core science subjects. Similarly, the result indicated significant influence of SPS
on achievement in science subjects. It is recommended that science teachers should be familiar
with the language of mathematics since many of the science concepts involve the use of numbers,
symbols, signs and mathematical expression for problem-solving.