agreement. (See Board of Trustees v. Cook County College Teachers Union (1979), 74 Ill. 2d 412, 386 N.E.2d 47.) The language of article 44 — 8 of the collective bargaining agreement is clear and unambiguous. No other article in the contract indicates that the provision was intended to provide income protection for a teacher temporarily absent, or limits the time for which a teacher may be compensated during absences resulting from a school-related assault. Nor are we persuaded that an article in the collective bargaining agreement, making salary schedules subject to yearly budget appropriations, restricts the application of article 44 — 8. An appropriation was made by the Board for DaBrien s salary in 1974, the year in which she was injured. The Board paid her salary from January 1, 1974, to the date of the assault and, after she filed the initial grievance under article 44 — 8, the Board paid her salary until the end of the 1973-74 school year. In each following year, the Board has appropriated salaries, not with regard to specific teachers, but, rather, for the positions generally. Therefore, although DaBrien could not work because of her injuries, she remained a teacher for purposes of the budget. For these reasons, we conclude that the grievance was arbitrable and that article 44 — 8 was properly interpreted by the arbitrator.
II
. The second ground for reversal suggested by the Board involves the application of the Workmen’s Compensation Act (Ill. Rev. Stat. 1973, ch. 48, par. 138.1 et seq.). It is argued that, because DaBrien was awarded $16,453.12 in workmen’s compensaton benefits as a result of the injuries sustained in the assault,' she is precluded from realizing a “double” recovery under article 44 — 8 of the collective bargaining agreement.
The Workmens’s Compensation Act provides, in part:
“The compensation herein provided, together with the provisions of this Act, shall be the measure of the responsibility of any employer (Ill. Rev. Stat. 1973, ch. 48, par. 138.11.)
The Act further provides:
“No common law or statutory right to recover damages from the employer, other than the compensation herein provided, is available to any employee who is covered by the provisions of this Act ° (Emphasis added.) Ill. Rev. Stat. 1973, ch. 48, par. 138.5(a).
Although these sections and other provisions of the Workmen’s Compensation Act provide an employee with an exclusive statutory remedy against. his employer for an industrial accident (Duley v. Caterpillar Tractor Co. (1969), 44 Ill. 2d 15, 253 N.E.2d 373), they do not prevent the parties from agreeing by contract to supplement the benefits conferred by the Act.