Logistic growth model and its variants have been adjudged to be the most appropriate model for forecasting human population. However, in this article, we estimated the carrying capacity of Abuja using the logistic model. Then, we presented the parameters used to ascertain that the logistic model has the best fit in modelling population growth of Abuja over time. Meanwhile, a population growth sensitivity analysis is presented for the year 1962 to 2200.The result shows that by the year 2050, Abuja population growth rate will be out of control, if nothing substantial is implemented. Similarly, from the year 2150, the results show that stability will return again. Furthermore, the result of the error analysis conducted on the logistic model shows that Abuja has a growing population and that logistic growth model with MAPE and RMSE values of 0.98% and 7,817.07 respectively is the most accurate. The study concludes that logistic growth model with R−squared value of 0.776 has the best fit for population growth projection of Abuja. With approximate growth rate at 9.3% per annum, the projected population of Abuja will hit 30,220,701 million by the year 2039 all things being equal. Therefore, we recommend that the government should invest in massive agricultural reforms to accommodate the growing population, expand Abuja by developing its suburbs, and engage in massive reorientation of the populace on the dangers of uncontrolled births and the education of the girl child.

The study adopted a mixed-method research approach. The population size of this study constitutes the last batch of Diploma in Basic Education (DBE) and the current first-year students of the new programme (Bachelor in Basic Education) of Mount Mary College of Education. Purposive and random sampling techniques were used to select seven hundred and seventy-nine (779) respondents for the study. A purposive sampling technique was used to select final year Diploma in Basic Education (DBE), made up of 312 and first-batch first-year students of the new programme (Bachelor in Basic Education) of Mount Mary College of Education, made of up 467 were used for data collection. A simple random technique was used to select 15 long essays from the final year Diploma in Basic Education while 30 assignments were selected from the first batch Bachelor in Basic Education students. Documents and interview guides were used for data collection. With an interpretative lens, the data were analysed in themes. The challenges in writing are the substitution of one modal verb for another, forceful insertions of modal verbs and improper modal forms. There was also proof that students were found to have used modal verbs in sentences that lacked the corresponding relationship with other clausal elements, making such constructions grammatically and pragmatically non-harmonious. It is recommended that there is a need to have a run-on design of the curricula by making sure that, a gradual introduction of modal verbs begins from the basic and low-grade level of the educational system to the highest. As these learners move up, they will correctly apply the verbs, changing from the core meaning of the modals to more complex uses. This concerted effort though will not be a panacea to the modal verbs challenge; it could mitigate he problem to a large extent.